package com.qf.air.interceptor;

import com.qf.air.constants.AirConstants;
import com.qf.air.jedis.JedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @Author: 维多利加
 * @Date: 2021/3/25 19:20
 */
@Component
public class AuthenticationInterceptor implements HandlerInterceptor {

    @Autowired
    private JedisUtil jedisUtil;

    /**
     * 前处理
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1. 从session中查询用户信息
        // User user = (User) request.getSession().getAttribute("user");
        //1.1 获取Cookie
        String keySuffix = null;
        Cookie[] cookies = request.getCookies();
        if(cookies != null){
            for (Cookie cookie : cookies) {
                if (AirConstants.USER_COOKIE.equals(cookie.getName())) {
                    keySuffix = cookie.getValue();
                    break;
                }
            }
        }
        if(!StringUtils.isEmpty(keySuffix)){
            // 登录过
            String key = AirConstants.USER_REDIS_PREFIX + keySuffix;
            String user = jedisUtil.get(key);
            //2.如果登录了，return true，如果没登陆 return false
            if(user != null){
                jedisUtil.expire(key,AirConstants.USER_TIMEOUT);
                return true;
            }
        }
        return false;
    }

}
